Examined the assumption that Spearman's law acts unsystematically and approximately uniformly for various subtests of cognitive ability in an IQ test battery when high- and low-ability IQ groups are selected. Data from national standardization samples for Wechsler adult and child IQ tests affirm regularities in Spearman's "Law of Diminishing…

Psychometric g is by far more highly correlated with all tests conventionally called "IQ," cognitive abilities, and the like, than any other single factor or combination of other factors independent of g. Researchers must now examine the nature of psychometric g, including its causal underpinnings. (LMO)

Data from a previous adoption study using the Wechsler Intelligence Scale for Children-Revised show that the genetic effect is reflected by psychometric "g" (general intelligence) to a greater degree than is the environmental effect. This finding is consistent with the hypothesis that "g" largely reflects the genetic component…

A short critique of a 1974 monograph. (MS)

A large number of national and geographic population samples were used to test the hypothesis that the variation in mean values of skin color in the diverse populations are consistently correlated with the mean measured or estimated IQs of the various groups, as are some other physical variables, known as an ecological correlation. Straightforward…

The first eight chapters of this book introduce the topic of test bias. The basic issues involved in criticisms of mental tests and arguments about test bias include: (1) variety of tests and test items; (2) scaling of scores and the form of the distribution of abilities in the population; (3) quantification of subpopulation differences; (4)…

Internal evidence of cultural bias, in terms of various types of item analysis, was sought in the Wonderlic Personnel Test results in large, representative samples of whites and Negroes totalling some 1,500 subjects. Essentially, the lack of any appreciable Race X Items interaction and the high interracial similarity in rank order of item…

Concludes that these standardized tests of intelligence--the Peabody Picture Vocabulary, Raven's Progressive Matrices, Stanford-Binet, Wechsler Intelligence Scale for Children, Wonderlic Personnel Test, and most likely many other similar tests--show practically no evidence of differential culture bias for blacks and whites. (Author)

The author examines claims that the Kaufman Assessment Battery for Children (K-ABC) is less culturally biased than other standard tests of intelligence. He concludes that the diminished Black-White difference for the K-ABC is largely the result of psychometric and statistical artifacts. Implications for future test construction are noted.…

This study investigated whether a unitary elemental process or several independent processes underlie psychometric "g" (factor of general intelligence). Results with 101 college students administered 2 intelligence tests and a large battery of elementary cognitive tasks suggest that as many as 4 independent components make up…

The author presents intelligence and learning as theoretically and empirically separate concepts. Examining Spearman's "g" factor and the evolution, phylogeny and psychometrics of intelligence, he concludes that "g" is of dominant importance in scholastic learning. He notes some implications for equal educational opportunity.…

This commentary on a paper by Douglas Detterman and others (EC 604 995), on assessing basic cognitive abilities in young adults with and without mental retardation, argues that variables measuring correct responding and variables measuring response latency or speed are two aspects of the same underlying continuum of speed and efficiency of…

Based on a paper presented at the American Educational Research Association Convention (Annual, Chicago, Illinois, February 8, 1968).

A large battery of various tests of intelligence, scholastic achievement, and short-term memory was administered to some 2,000 white, black, and Mexican American pupils in grades 4, 5, and 6 in a largely agricultural school district in the central valley of California; the 3 grades were used as separate replications. Factor analysis with oblique…